package com.company.project.utils;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class CookieUtil
{
	private CookieUtil()
	{
	}

	/**
	 * 添加cookie
	 *
	 * @param response
	 * @param name
	 * @param value
	 * @param maxAge Sets the maximum age of the cookie in seconds.
	 */
	public static void addCookie(HttpServletResponse response, String name, String value, int maxAge)
	{
		Cookie cookie = new Cookie(name, value);
		cookie.setPath("/");
		if (maxAge > 0)
		{
			cookie.setMaxAge(maxAge);
		}
		response.addCookie(cookie);
	}

	/**
	 * 删除cookie
	 *
	 * @param response
	 * @param name
	 */
	public static void removeCookie(HttpServletResponse response, String name)
	{
		Cookie uid = new Cookie(name, null);
		uid.setPath("/");
		uid.setMaxAge(0);
		response.addCookie(uid);
	}

	/**
	 * 获取cookie值
	 *
	 * @param request
	 * @return
	 */
	public static String getCookieValue(HttpServletRequest request, String cookieName)
	{
		Cookie cookies[] = request.getCookies();
		for (Cookie cookie : cookies)
		{
			if (cookie.getName().equals(cookieName))
			{
				return cookie.getValue();
			}
		}
		return null;
	}

}
